Search Results - "Leupold, D"

A Review on Endoscopic Management of Acute Cholecystitis: Endoscopic Ultrasound-Guided Gallbladder Drainage and Endoscopic Transpapillary Gallbladder Drainage by Manudhane, Albert P, Leupold, Matthew D, Shah, Hamza W, Shah, Raj, Han, Samuel Y, Lee, Peter J, Burlen, Jordan J, Papachristou, Georgios I, Krishna, Somashekar G

“…A percutaneous cholecystostomy tube (PCT) is the conventionally favored nonoperative intervention for treating acute cholecystitis. However, PCT is beset by…”
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Clinical and genetic characteristics of chronic progressive external ophthalmoplegia (CPEO) by Leupold, D, Clodius, S, Reichmann, H, Jackson, S

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tribute: Professor Dr. Paul Hoffmann (March 28, 1931-July 10, 2008), a scientist with a great collaborative spirit by Lokstein, H, Höxtermann, E, Leupold, D, Garab, G, Renger, G

“…Photosynthesis scholar/professor Paul Hoffmann died on Jul 10, 2008 at the age of 77. Highlights of his distinguished work in the field are offered…”
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Fluorescence of native and carotenoid‐depleted LH2 from Chromatium minutissimum, originating from simultaneous two‐photon absorption in the spectral range of the presumed (optically ‘dark’) S1 state of carotenoids by Krikunova, M, Kummrow, A, Voigt, B, Rini, M, Lokstein, H, Moskalenko, A, Scheer, H, Razjivin, A, Leupold, D

“…Native and carotenoid‐depleted peripheral purple bacterial light‐harvesting complex (LH2) were investigated by simultaneous two‐photon excited (between…”
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Excitation Trap Approach to Analyze Size and Pigment−Pigment Coupling:  Reconstitution of LH1 Antenna of Rhodobacter sphaeroides with Ni-Substituted Bacteriochlorophyll by Fiedor, Leszek, Leupold, Dieter, Teuchner, Klaus, Voigt, Berndt, Hunter, C. Neil, Scherz, Avigdor, Scheer, Hugo

“…Replacement of the central Mg in chlorophylls by Ni opens an ultrafast (tens of femtoseconds time range) radiationless de-excitation path, while the principal…”
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Size Enhancement of Transition Dipoles to One- and Two-Exciton Bands in a Photosynthetic Antenna by Leupold, D, Stiel, H, Teuchner, K, Nowak, F, Sandner, W, Ücker, B, Scheer, H

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Pigment–protein architecture in the light-harvesting antenna complexes of purple bacteria: does the crystal structure reflect the native pigment–protein arrangement? by Leupold, D, Voigt, B, Beenken, W, Stiel, H

“…Structural analysis of crystallized peripheral (LH2) and core antenna complexes (LH1) of purple bacteria has revealed circular aggregates of high rotational…”
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Towards elucidating the energy of the first excited singlet state of xanthophyll cycle pigments by X-ray absorption spectroscopy by Gruszecki, W.I., Stiel, H., Niedzwiedzki, D., Beck, M., Milanowska, J., Lokstein, H., Leupold, D.

“…The first excited singlet state (S 1) of carotenoids (also termed 2A g −) plays a key role in photosynthetic excitation energy transfer due to its close…”
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Evaluation of the energetic position of the lowest excited singlet state of β-carotene by NEXAFS and photoemission spectroscopy by Beck, M, Stiel, H, Leupold, D, Winter, B, Pop, D, Vogt, U, Spitz, C

“…In carotenoids the lowest energetic optical transition belonging to the π-electron system is forbidden by symmetry, therefore the energetic position of the S 1…”
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Introduction of a 60 fs deactivation channel in the photosynthetic antenna LH1 by Ni-bacteriopheophytin a by Fiedor, L, Scheer, H, Hunter, C.N, Tschirschwitz, F, Voigt, B, Ehlert, J, Nibbering, E, Leupold, D, Elsaesser, T

“…Forty femtosecond pump and probe investigations in the 870 nm absorption band of the reconstituted core antenna, LH1, from Rhodobacter sphaeroides, in which…”
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One- and Two-Photon-Induced Photochemistry of Modified Palladium Porphyrazines Involving Molecular Oxygen by Freyer, W., Stiel, H., Hild, M., Teuchner, K., Leupold, D.

“…— Octaphenyltetraanthraporphyrazinato palladium undergoes a self‐sensitized photoreaction in the presence of oxygen to form a substituted palladium…”
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Photophysical characterization of the B800-depleted light harvesting complex B850 of Rhodobacter sphaeroides: Implications to the ultrafast energy transfer 800→850 nm by Leupold, D., Stiel, H., Ehlert, J., Nowak, F., Teuchner, K., Voigt, B., Bandilla, M., Ücker, B., Scheer, H.

“…From the isolated LH2 antenna of Rhodobacter sphaeroides, called B800-850, the bacteriochlorophyll a pigment complement BChl-B800, mainly responsible for the…”
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Photophysical Consequences of Coupling Bacteriochlorophyll a with Serine and its Resulting Solubility in Water by Eichwurzel, I., Stiel, H., Teuchner, K., Leupold, D., Scheer, H., Salomon, Y., Scherz, A.

“…We investigated the dependence on solvents of optical absorption and emission of the bacteriochlorophyll a-serine (BChl-ser), a water soluble…”
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Fluorescence and excited state absorption in modified pigments of bacterial photosynthesis a comparative study of metal-substituted bacteriochlorophylls a by Teuchner, K., Stiel, H., Leupold, D., Scherz, A., Noy, D., Simonin, I., Hartwich, G., Scheer, H.

“…A series of transmetalated bacteriochlorophylls, where the central magnesium has been replaced by Pd, Ni, Zn, Cd, Cu, have been investigated by linear and…”
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Towards PDT sensitizers with internal source of singlet oxygen by Freyer, W., Leupold, D.

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Spectroscopic properties of potential sensitizers for new photodynamic therapy start mechanisms via two-step excited electronic states by Teuchner, K, Pfarrherr, A, Stiel, H, Freyer, W, Leupold, D

“…Three substituted tetraazaporphyrins, octa-(4-tert-butylphenyl)-tetrapyrazinoporphyrazine, tetra-(4-tert-butyl)phthalocyanine and…”
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Detection of the metastable rippled gel phase in hydrated phosphatidylcholine by fluorescence spectroscopy by Vladkova, R, Teuchner, K, Leupold, D, Koynova, R, Tenchov, B

“…Steady-state and time-resolved emission spectroscopy of 1-anilinonaphthalene-8-sulfonic acid (ANS) have been used for characterization of the metastable…”
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Substructures and different energy relaxation time within the first electronic transition of pinacyanol by Voigt, G., Nowak, F., Ehlert, J., Beenken, W.J.D., Leupold, D., Sandner, W.

“…The S 0-S 1 absorption band substructure of pinacyanol dissolved in ethanol has been investigated with nonlinear polarisation spectroscopy in the frequency…”
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Proposal of modified mechanisms for photodynamic therapy by Leupold, D, Freyer, W

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Intensity-dependent enzyme photosensitization using 532 nm nanosecond laser pulses by Lambert, C R, Stiel, H, Leupold, D, Lynch, M C, Kochevar, I E

“…The intensity dependence of the rose bengal (RB)-photosensitized inhibition of red blood cell acetylcholinesterase has been studied experimentally and the…”
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